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171bdaca JK |
1 | #!/bin/sh |
2 | ||
3 | test_description='handling of duplicate objects in incoming packfiles' | |
4 | . ./test-lib.sh | |
5 | . "$TEST_DIRECTORY"/lib-pack.sh | |
6 | ||
7 | # The sha1s we have in our pack. It's important that these have the same | |
8 | # starting byte, so that they end up in the same fanout section of the index. | |
9 | # That lets us make sure we are exercising the binary search with both sets. | |
10 | LO_SHA1=e68fe8129b546b101aee9510c5328e7f21ca1d18 | |
11 | HI_SHA1=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 | |
12 | ||
13 | # And here's a "missing sha1" which will produce failed lookups. It must also | |
14 | # be in the same fanout section, and should be between the two (so that during | |
15 | # our binary search, we are sure to end up looking at one or the other of the | |
16 | # duplicate runs). | |
17 | MISSING_SHA1='e69d000000000000000000000000000000000000' | |
18 | ||
19 | # git will never intentionally create packfiles with | |
20 | # duplicate objects, so we have to construct them by hand. | |
21 | # | |
22 | # $1 is the name of the packfile to create | |
23 | # | |
24 | # $2 is the number of times to duplicate each object | |
25 | create_pack () { | |
26 | pack_header "$((2 * $2))" >"$1" && | |
27 | for i in $(test_seq 1 "$2"); do | |
28 | pack_obj $LO_SHA1 && | |
29 | pack_obj $HI_SHA1 | |
30 | done >>"$1" && | |
31 | pack_trailer "$1" | |
32 | } | |
33 | ||
34 | # double-check that create_pack actually works | |
35 | test_expect_success 'pack with no duplicates' ' | |
36 | create_pack no-dups.pack 1 && | |
37 | git index-pack --stdin <no-dups.pack | |
38 | ' | |
39 | ||
40 | test_expect_success 'index-pack will allow duplicate objects by default' ' | |
41 | clear_packs && | |
42 | create_pack dups.pack 100 && | |
43 | git index-pack --stdin <dups.pack | |
44 | ' | |
45 | ||
46 | test_expect_success 'create batch-check test vectors' ' | |
47 | cat >input <<-EOF && | |
48 | $LO_SHA1 | |
49 | $HI_SHA1 | |
50 | $MISSING_SHA1 | |
51 | EOF | |
52 | cat >expect <<-EOF | |
53 | $LO_SHA1 blob 2 | |
54 | $HI_SHA1 blob 0 | |
55 | $MISSING_SHA1 missing | |
56 | EOF | |
57 | ' | |
58 | ||
59 | test_expect_success 'lookup in duplicated pack (binary search)' ' | |
60 | git cat-file --batch-check <input >actual && | |
61 | test_cmp expect actual | |
62 | ' | |
63 | ||
64 | test_expect_success 'lookup in duplicated pack (GIT_USE_LOOKUP)' ' | |
65 | ( | |
66 | GIT_USE_LOOKUP=1 && | |
67 | export GIT_USE_LOOKUP && | |
68 | git cat-file --batch-check <input >actual | |
69 | ) && | |
70 | test_cmp expect actual | |
71 | ' | |
72 | ||
16c159d7 JK |
73 | test_expect_success 'index-pack can reject packs with duplicates' ' |
74 | clear_packs && | |
75 | create_pack dups.pack 2 && | |
76 | test_must_fail git index-pack --strict --stdin <dups.pack && | |
77 | test_expect_code 1 git cat-file -e $LO_SHA1 | |
78 | ' | |
79 | ||
171bdaca | 80 | test_done |